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SELECT 
  cscart_ult_product_prices.product_id, 
  MIN(
    IF(
      cscart_ult_product_prices.percentage_discount = 0, 
      cscart_ult_product_prices.price, 
      cscart_ult_product_prices.price - (
        cscart_ult_product_prices.price * cscart_ult_product_prices.percentage_discount
      )/ 100
    )
  ) AS price 
FROM 
  cscart_ult_product_prices 
WHERE 
  cscart_ult_product_prices.product_id IN (
    2280, 2327, 2328, 2329, 2330, 2394, 2395, 
    2396, 2397, 2398, 2399, 2400, 2401, 
    2402, 2505, 2506, 2507, 2508, 5876, 
    5877, 5878, 5879, 5880, 5926, 5927, 
    5928, 5929, 5930, 5994, 5995, 5996, 
    5997, 5998, 5999, 6000, 6001, 6002, 
    6105, 6106, 6107, 6108, 1653, 2224, 
    1599, 1572, 2603, 6191, 2509
  ) 
  AND cscart_ult_product_prices.lower_limit = 1 
  AND cscart_ult_product_prices.company_id = 1 
  AND cscart_ult_product_prices.usergroup_id IN (0, 0, 1) 
GROUP BY 
  cscart_ult_product_prices.product_id

Query time 0.00083

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}