SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    65705, 65561, 64614, 60731, 60726, 60750, 
    60734, 61388, 64622, 60741, 64623, 
    64626
  )

Query time 0.00084

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 (65705,65561,64614,60731,60726,60750,60734,61388,64622,60741,64623,64626)"
    }
  }
}

Result