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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 (
    5444, 5445, 5446, 5447, 5448, 5449, 5450, 
    5451, 5452, 5453, 5454, 5455, 5456, 
    5457, 5458, 5459, 5460, 6727, 1672, 
    1673, 1674, 1675, 1676, 1677, 1678, 
    1679, 1680, 1681, 1682, 1683, 1684, 
    1685, 1686, 1687, 1688, 1689, 1690, 
    1691, 1692, 1693, 1694, 1695, 1696, 
    1697, 1698, 1699, 1700, 1701
  ) 
  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 0.00034

JSON explain

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