SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    402270, 409565, 460167, 427920, 404850, 
    452306, 433998, 428694, 454298, 452982, 
    456262, 419210
  )

Query time 0.00052

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 (402270,409565,460167,427920,404850,452306,433998,428694,454298,452982,456262,419210)"
        }
      }
    ]
  }
}