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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 (
    1788, 1697, 1657, 1687, 1921, 1238, 1197, 
    1307, 1306, 1940, 1941, 1660, 1751, 
    1677, 1305, 1588, 1662, 1635, 1747, 
    1587, 1771, 1709, 1957, 1707, 1768, 
    1710, 1438, 1954, 1953, 1730, 1686, 
    1593, 1594, 1616, 1773, 1701, 1584, 
    1585, 1868, 1579, 1956, 1495, 1739, 
    1740, 1912, 1913, 1650, 56, 1836, 1336, 
    1837, 1820, 1304, 1738, 1893, 1895, 
    1894, 1641, 1500, 1317, 1670, 1658, 
    1669, 1558, 1644, 1262, 1552, 1398, 
    1595, 1576, 1870, 1691, 1776, 1785, 
    1633, 1563, 1564, 1667, 1786, 1945, 
    1910, 1787, 1308, 1642, 1772, 1736, 
    1277, 1672, 1325, 1665, 1778, 1775, 
    1671, 1649, 1909, 1948
  ) 
  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 0.00074

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}