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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 (
    5248, 5249, 5250, 5251, 5252, 5253, 5254, 
    5255, 5256, 5257, 5258, 5259, 5260, 
    5261, 5262, 5263, 5264, 5265, 5266, 
    5267, 5268, 5269, 5270, 5271, 1600, 
    1601, 1602, 1603, 1604, 1605, 1606, 
    1607, 1608, 1609, 1610, 1611, 1612, 
    1613, 1614, 1615, 1616, 1617, 1618, 
    1619, 1620, 1621, 1622, 1623
  ) 
  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 0.00028

JSON explain

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