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 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 (
    (
      1 
      AND products.product_id IN (
        66063, 66064, 66065, 66066, 66067, 66068, 
        66069, 66070, 66071, 66072, 66073, 
        66074, 66075, 66076, 66077, 66078, 
        66079, 66080, 66081, 66082, 66083, 
        66084, 66085, 66086, 66087, 66088, 
        66089, 66090, 66091, 66092
      )
    ) 
    AND companies.status IN ('A') 
    AND prices.usergroup_id IN (0, 0, 1)
  ) 
  AND (
    products.available_worldwide = 'Y' 
    OR prc.country_code IS NULL
  ) 
GROUP BY 
  products.product_id 
ORDER BY 
  products.timestamp desc, 
  products.product_id desc, 
  products.product_id ASC

Query time 0.00201

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 products range PRIMARY,status PRIMARY 3 30 Using where; Using join buffer (flat, BNL join)
1 SIMPLE shared_descr eq_ref PRIMARY,product_id,company_id PRIMARY 13 toolboxdigitalshop_dev.products.product_id,const,const 1 Using where
1 SIMPLE prc eq_ref PRIMARY PRIMARY 9 toolboxdigitalshop_dev.products.product_id,const 1 Using where; Using index
1 SIMPLE prices ref usergroup,product_id,lower_limit,usergroup_id usergroup 3 toolboxdigitalshop_dev.products.product_id 1 Using where; Using index
1 SIMPLE descr1 eq_ref PRIMARY,product_id PRIMARY 9 toolboxdigitalshop_dev.products.product_id,const 1 Using where
1 SIMPLE products_categories ref PRIMARY,pt pt 3 toolboxdigitalshop_dev.products.product_id 1 Using index
1 SIMPLE cscart_categories eq_ref PRIMARY,c_status,p_category_id PRIMARY 3 toolboxdigitalshop_dev.products_categories.category_id 1 Using where

Result

product_id product company_name product_type parent_product_id
66092 Dr Dot (Grady G Remix) Toolbox Digital Shop P 0
66091 Bad Guy Smoked (Original Mix) Toolbox Digital Shop P 0
66090 Original Roughneck (Original Mix) Toolbox Digital Shop P 0
66089 This Is (Original Mix) Toolbox Digital Shop P 0
66088 Bust That (Original Mix) Toolbox Digital Shop P 0
66087 Bass (Part 1) (Lucy Fur Remix) Toolbox Digital Shop P 0
66086 MotherFuckinTwisted (Ben Stevens Remix) Toolbox Digital Shop P 0
66085 Balls Out (Original Mix) Toolbox Digital Shop P 0
66084 Shark Bait (Part 2) (Original Mix) Toolbox Digital Shop P 0
66083 Like This (Original Mix) Toolbox Digital Shop P 0
66082 Eyes Closed (Original Mix) Toolbox Digital Shop P 0
66081 Massive Banger (BK's GoHard Remix) Toolbox Digital Shop P 0
66080 Damn Right (Original Mix) Toolbox Digital Shop P 0
66079 Beat Of The Kick Drum (Wayne Smart Remix) Toolbox Digital Shop P 0
66078 X-Press (Hard NRG Mix) Toolbox Digital Shop P 0
66077 Bean Machine (Original Mix) Toolbox Digital Shop P 0
66076 Snatch (Original Mix) Toolbox Digital Shop P 0
66075 Bitch Kick (Original Mix) Toolbox Digital Shop P 0
66074 Dark Winter (Original Mix) Toolbox Digital Shop P 0
66073 Ta Mere (Original Mix) Toolbox Digital Shop P 0
66072 Motherfucker (Hilly Remix) Toolbox Digital Shop P 0
66071 OMG (Original Mix) Toolbox Digital Shop P 0
66070 Funked Off (Original Mix) Toolbox Digital Shop P 0
66069 Infinity (Original Mix) Toolbox Digital Shop P 0
66068 Somewhere Anywhere (Original Mix) Toolbox Digital Shop P 0
66067 DomDeVit (Original Mix) Toolbox Digital Shop P 0
66066 Helichopter (Original Mix) Toolbox Digital Shop P 0
66065 Jumbles (Original Mix) Toolbox Digital Shop P 0
66064 Frantic (Original Mix) Toolbox Digital Shop P 0
66063 Busy With The Bass (Original Mix) Toolbox Digital Shop P 0