SELECT 
  SQL_CALC_FOUND_ROWS products.product_id, 
  IF(
    shared_descr.product_id IS NOT NULL, 
    shared_descr.product, descr1.product
  ) as product, 
  companies.company as company_name, 
  products.product_type, 
  products.parent_product_id 
FROM 
  cscart_products as products 
  LEFT JOIN cscart_product_descriptions as descr1 ON descr1.product_id = products.product_id 
  AND descr1.lang_code = 'en' 
  LEFT JOIN cscart_product_prices as prices ON prices.product_id = products.product_id 
  AND prices.lower_limit = 1 
  LEFT JOIN cscart_companies AS companies ON companies.company_id = products.company_id 
  INNER JOIN cscart_products_categories as products_categories ON products_categories.product_id = products.product_id 
  INNER JOIN cscart_categories ON cscart_categories.category_id = products_categories.category_id 
  AND (
    cscart_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_categories.usergroup_ids
    )
  ) 
  AND cscart_categories.status IN ('A', 'H') 
  AND cscart_categories.storefront_id IN (0, 1) 
  LEFT JOIN cscart_ult_product_descriptions shared_descr ON shared_descr.product_id = products.product_id 
  AND shared_descr.company_id = 1 
  AND shared_descr.lang_code = 'en' 
  LEFT JOIN cscart_product_restricted_countries AS prc ON prc.product_id = products.product_id 
  AND prc.country_code = 'US' 
WHERE 
  1 
  AND cscart_categories.category_id IN (22, 32, 33, 34, 39) 
  AND companies.status IN ('A') 
  AND (
    products.usergroup_ids = '' 
    OR FIND_IN_SET(0, products.usergroup_ids) 
    OR FIND_IN_SET(1, products.usergroup_ids)
  ) 
  AND products.status IN ('A') 
  AND prices.usergroup_id IN (0, 0, 1) 
  AND (
    products.available_worldwide = 'Y' 
    OR prc.country_code IS NULL
  ) 
  AND !(
    products.out_of_stock_actions = 'B' && products.avail_since > 1747960134
  ) 
  AND products.parent_product_id = 0 
GROUP BY 
  products.product_id 
ORDER BY 
  products.timestamp desc, 
  products.product_id desc, 
  products.product_id ASC 
LIMIT 
  9120, 40

Query time 0.55728

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE companies ALL PRIMARY 1 Using where; Using temporary; Using filesort
1 SIMPLE cscart_categories range PRIMARY,c_status,p_category_id PRIMARY 3 5 Using where; Using join buffer (flat, BNL join)
1 SIMPLE products_categories ref PRIMARY,pt PRIMARY 3 toolboxdigitalshop_dev.cscart_categories.category_id 908 Using index
1 SIMPLE products eq_ref PRIMARY,status,idx_parent_product_id PRIMARY 3 toolboxdigitalshop_dev.products_categories.product_id 1 Using where
1 SIMPLE shared_descr eq_ref PRIMARY,product_id,company_id PRIMARY 13 toolboxdigitalshop_dev.products_categories.product_id,const,const 1 Using where
1 SIMPLE prc eq_ref PRIMARY PRIMARY 9 toolboxdigitalshop_dev.products_categories.product_id,const 1 Using where; Using index
1 SIMPLE descr1 eq_ref PRIMARY,product_id PRIMARY 9 toolboxdigitalshop_dev.products_categories.product_id,const 1 Using where
1 SIMPLE prices ref usergroup,product_id,lower_limit,usergroup_id usergroup 3 toolboxdigitalshop_dev.products_categories.product_id 1 Using where; Using index

Result

product_id product company_name product_type parent_product_id
87668 Murdermind (Original Mix) Toolbox Digital Shop P 0
87667 Basic Rules (Original Mix) Toolbox Digital Shop P 0
87689 If I Can Love You (Radio Edit) Toolbox Digital Shop P 0
87688 If I Can Love You (Extended Mix) Toolbox Digital Shop P 0
87651 Run To Heaven With Me (Original Mix) Toolbox Digital Shop P 0
87790 Heartbreak (Original Mix) Toolbox Digital Shop P 0
87789 Fuck That Feeling (Original Mix) Toolbox Digital Shop P 0
87681 Colour Of Sound (Original Mix) Toolbox Digital Shop P 0
87758 Mi sensi (Original Mix) Toolbox Digital Shop P 0
87757 Enter The Ravezone (YK Project Remix) Toolbox Digital Shop P 0
87756 Enter The Ravezone (Artifex Remix) Toolbox Digital Shop P 0
87755 Enter The Ravezone (Original Mix) Toolbox Digital Shop P 0
87684 Automate (Original Mix) Toolbox Digital Shop P 0
87677 Quick Love (Original Mix) Toolbox Digital Shop P 0
87585 Memories (Original Mix) Toolbox Digital Shop P 0
87885 Colour Blind (Original Mix) Toolbox Digital Shop P 0
88049 Kick The Mechanism (Original Mix) Toolbox Digital Shop P 0
88048 Don't Cry (Original Mix) Toolbox Digital Shop P 0
88047 Beyond Revolution (Original Mix) Toolbox Digital Shop P 0
88046 Back In Time (Original Mix) Toolbox Digital Shop P 0
88045 Psychotica (Original Mix) Toolbox Digital Shop P 0
87873 I Believe (Original Mix) Toolbox Digital Shop P 0
87766 Get The Fuck Back (Original Mix) Toolbox Digital Shop P 0
87765 I Don't Give a Fuck (Original Mix) Toolbox Digital Shop P 0
87646 To The Beat (Original Mix) Toolbox Digital Shop P 0
87590 Butterflies (Radio Edit) Toolbox Digital Shop P 0
87589 Butterflies (Extended Mix) Toolbox Digital Shop P 0
88131 Glitch Riffard (Original Mix) Toolbox Digital Shop P 0
88130 The Puppeteer (Original Mix) Toolbox Digital Shop P 0
88129 A Long Time In Darkness (Original Mix) Toolbox Digital Shop P 0
88128 The Path To Enlightenment (Original Mix) Toolbox Digital Shop P 0
88071 This Is War (X-Mind Remix) Toolbox Digital Shop P 0
88070 This Is War (Original Mix) Toolbox Digital Shop P 0
88069 Moon Dangerous (Original Mix) Toolbox Digital Shop P 0
88057 Danger Zone (Original Mix) Toolbox Digital Shop P 0
88056 Pumpin' The Flow (Original Mix) Toolbox Digital Shop P 0
88055 Battle Station Ready (Original Mix) Toolbox Digital Shop P 0
87482 Opus (Dreams) (Radio Edit) Toolbox Digital Shop P 0
87481 Opus (Dreams) (Extended Mix) Toolbox Digital Shop P 0
87487 Disputed (Original Mix) Toolbox Digital Shop P 0