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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 (
    12554, 12555, 12556, 12557, 12558, 12559, 
    12560, 12561, 12562, 12563, 12564, 
    12565, 12566, 12567, 12568, 12569, 
    12570, 12571, 12572, 12573, 12574, 
    12575, 12576, 12577, 12578, 12579, 
    12580, 12581, 12582, 12583, 12584, 
    12585, 12586, 12587, 12588, 12589, 
    12590, 12591, 12592, 12593
  ) 
  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 0.00025

JSON explain

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