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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 (
    1780, 1781, 1782, 1783, 1784, 1785, 1786, 
    1787, 1788, 1789, 1790, 1791, 1792, 
    1793, 1794, 1795, 1796, 1797, 1798, 
    1799, 1800, 1801, 1802, 1803, 1804, 
    1805, 1806, 1807, 1808, 1809, 1810, 
    1811, 1812, 1813, 1814, 1815, 1816, 
    1817, 1818, 1819, 3744, 3745, 3746, 
    3747, 5461, 5462, 5463, 5464
  ) 
  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 0.00027

JSON explain

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