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 (
        125557, 125558, 125559, 125560, 125561, 
        125562, 125563, 125564, 125565, 125566, 
        125567, 125568, 125569, 125570, 125571, 
        125572, 125573, 125574, 125575, 125576, 
        125577, 125578, 125579, 125580, 125581, 
        125582, 125583, 125584, 125585, 125586, 
        125587, 125588, 125589, 125590
      )
    ) 
    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 0.00228

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 34 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
125590 Are You All Ready (Extended Mix) Toolbox Digital Shop P 0
125589 Internal Drama (Extended Mix) Toolbox Digital Shop P 0
125588 Here We Go (Karim Extended Remix) Toolbox Digital Shop P 0
125587 Double Edged Sword (Extended Mix) Toolbox Digital Shop P 0
125586 Want Some (Extended Mix) Toolbox Digital Shop P 0
125585 What Ya Got (Paul Glazby Extended Remix) Toolbox Digital Shop P 0
125584 Let's Rock (Pants & Corset Extended Remix) Toolbox Digital Shop P 0
125583 Attack Of The 50ft DJ (Extended Mix) Toolbox Digital Shop P 0
125582 Kick It (BK Extended Remix) Toolbox Digital Shop P 0
125581 Salt & Shake (Extended Mix) Toolbox Digital Shop P 0
125580 Kanashimi (Extended Mix) Toolbox Digital Shop P 0
125579 I Need To Know (Extended Mix) Toolbox Digital Shop P 0
125578 Good Timez (Karim Extended Remix) Toolbox Digital Shop P 0
125577 Naughty (Ground Zero Extended Remix) Toolbox Digital Shop P 0
125576 Never Lost His Hardcore (Baby Doc 97 Extended Remix) Toolbox Digital Shop P 0
125575 Black Is Black (Ian M Extended Remix) Toolbox Digital Shop P 0
125574 Just Cum (Extended Mix) Toolbox Digital Shop P 0
125573 Splashdown (Ben Stevens Extended Remix) Toolbox Digital Shop P 0
125572 Ready To Ride (Extended Mix) Toolbox Digital Shop P 0
125571 Player (Extended Mix) Toolbox Digital Shop P 0
125570 MFB (Extended Mix) Toolbox Digital Shop P 0
125569 Tension (Vicious Extended Mix) Toolbox Digital Shop P 0
125568 Mercy (OD404 Extended Remix) Toolbox Digital Shop P 0
125567 Observing The Earth (Ian M Extended Remix) Toolbox Digital Shop P 0
125566 Get Hot (Extended Mix) Toolbox Digital Shop P 0
125565 Nuclear Shower (Ilogik Extended Remix) Toolbox Digital Shop P 0
125564 Hoover Time (Captain Tinrib Extended Remix) Toolbox Digital Shop P 0
125563 Scirocco (Extended Mix) Toolbox Digital Shop P 0
125562 Take Me Back (Extended Mix) Toolbox Digital Shop P 0
125561 Fatter Than Your Mate's Mum (Extended Mix) Toolbox Digital Shop P 0
125560 Rave Monkey (JP & Jukesy Extended Remix) Toolbox Digital Shop P 0
125559 Hellraiser (Extended Mix) Toolbox Digital Shop P 0
125558 Turntablism (Extended Mix) Toolbox Digital Shop P 0
125557 Reignite (Extended Mix) Toolbox Digital Shop P 0