SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    1157, 1180, 394, 910, 1158, 1449, 2096, 
    2505, 502, 1137, 323, 516, 791, 1064, 
    1177, 1245, 1256, 915, 921, 924, 1246, 
    1357, 518, 994, 997, 1113, 1203, 1369, 
    1390, 2504, 321, 361
  )

Query time 0.00100

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_products",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 32,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (1157,1180,394,910,1158,1449,2096,2505,502,1137,323,516,791,1064,1177,1245,1256,915,921,924,1246,1357,518,994,997,1113,1203,1369,1390,2504,321,361)"
    }
  }
}