SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    444839, 428245, 418635, 426766, 438143, 
    427476, 438277, 423983, 418826, 451985, 
    420812, 455665
  )

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.0216566,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_products",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "loops": 1,
          "rows": 12,
          "cost": 0.0216566,
          "filtered": 100,
          "attached_condition": "cscart_products.product_id in (444839,428245,418635,426766,438143,427476,438277,423983,418826,451985,420812,455665)"
        }
      }
    ]
  }
}