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 (
    9975, 9976, 9977, 9978, 9979, 9876, 9877, 
    9878, 9880, 9881, 9882, 9883, 9885, 
    9886, 9888, 9889, 9890, 9891, 9892, 
    9893, 9894, 9895, 9896, 9897, 9899, 
    9900, 9901, 9903, 9838, 9839, 9840, 
    9841, 9842, 9843, 9844, 9845, 9846, 
    9847, 9848, 9849, 9850, 9851, 9852, 
    9853, 9854, 9855, 9856, 9857, 9858, 
    9859, 9860, 9861, 9862, 9863, 9814, 
    9815, 9816, 9817, 9818, 9820, 9821, 
    9822, 9823, 9824
  ) 
  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 0.00075

JSON explain

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