SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    298, 488, 52, 53, 54, 222, 55, 5474, 5473, 
    345, 56, 248, 57, 205, 518, 236, 392, 
    58
  )

Query time 0.00073

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": 18,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (298,488,52,53,54,222,55,5474,5473,345,56,248,57,205,518,236,392,58)"
    }
  }
}