SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    64374, 64468, 64375, 62704, 61273, 64470, 
    62408, 61247, 62584, 62432, 63830, 
    62846
  )

Query time 0.00058

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": 12,
      "filtered": 100,
      "attached_condition": "cscart_products.product_id in (64374,64468,64375,62704,61273,64470,62408,61247,62584,62432,63830,62846)"
    }
  }
}

Result