SELECT 
  cscart_product_prices.product_id, 
  MIN(
    IF(
      cscart_product_prices.percentage_discount = 0, 
      cscart_product_prices.price, 
      cscart_product_prices.price - (
        cscart_product_prices.price * cscart_product_prices.percentage_discount
      )/ 100
    )
  ) AS price 
FROM 
  cscart_product_prices 
WHERE 
  cscart_product_prices.product_id IN (
    11225, 11306, 11446, 11472, 11508, 11086, 
    11126, 11291, 11337, 11348, 11411, 
    11531, 11166, 11477, 11167, 11256, 
    11309, 11430, 11479, 11600, 11362, 
    11414, 11520, 11128, 11535, 11633, 
    11199, 11390, 11399, 11530, 11236, 
    11289, 11462, 11136, 11193, 11352, 
    11458, 11267, 11293, 11308
  ) 
  AND cscart_product_prices.lower_limit = 1 
  AND cscart_product_prices.usergroup_id IN (0, 1) 
GROUP BY 
  cscart_product_prices.product_id

Query time 0.00165

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "56.01"
    },
    "grouping_operation": {
      "using_filesort": false,
      "table": {
        "table_name": "cscart_product_prices",
        "access_type": "range",
        "possible_keys": [
          "usergroup",
          "product_id",
          "lower_limit",
          "usergroup_id"
        ],
        "key": "usergroup",
        "used_key_parts": [
          "product_id",
          "usergroup_id",
          "lower_limit"
        ],
        "key_length": "9",
        "rows_examined_per_scan": 80,
        "rows_produced_per_join": 80,
        "filtered": "100.00",
        "index_condition": "((`softwarepirmam_hewadelivard_cscart_4`.`cscart_product_prices`.`lower_limit` = 1) and (`softwarepirmam_hewadelivard_cscart_4`.`cscart_product_prices`.`product_id` in (11225,11306,11446,11472,11508,11086,11126,11291,11337,11348,11411,11531,11166,11477,11167,11256,11309,11430,11479,11600,11362,11414,11520,11128,11535,11633,11199,11390,11399,11530,11236,11289,11462,11136,11193,11352,11458,11267,11293,11308)) and (`softwarepirmam_hewadelivard_cscart_4`.`cscart_product_prices`.`usergroup_id` in (0,1)))",
        "cost_info": {
          "read_cost": "48.01",
          "eval_cost": "8.00",
          "prefix_cost": "56.01",
          "data_read_per_join": "1K"
        },
        "used_columns": [
          "product_id",
          "price",
          "percentage_discount",
          "lower_limit",
          "usergroup_id"
        ]
      }
    }
  }
}