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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 (
    1605, 1606, 1607, 1608, 1609, 1610, 1611, 
    1612, 1613, 1614, 1615, 1616, 1617, 
    1618, 1619, 1620, 1621, 1622, 1623, 
    1624, 1625, 5299, 5300, 5301, 5302, 
    5303, 5304, 5305, 5306, 5307, 5308, 
    5309, 5310, 5311, 5312, 5313, 5314, 
    5315, 5316, 5317, 5318, 5319, 5320, 
    5321, 5322, 5323, 5324, 5325
  ) 
  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 0.00029

JSON explain

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