SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    1666, 1664, 1557, 1695, 1559, 1315, 1310, 
    1471, 1502, 86, 1504, 33, 1944, 1942, 
    1900, 1777, 1748, 1679, 1702, 1610, 
    1706, 1683, 1946, 1524
  )

Query time 0.00120

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": 24,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (1666,1664,1557,1695,1559,1315,1310,1471,1502,86,1504,33,1944,1942,1900,1777,1748,1679,1702,1610,1706,1683,1946,1524)"
    }
  }
}