Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b465667570aff421620a05d693cc65e86935b6f4f100aa0e652253cd01d6f66f' 
  AND token = '1FqCfGuNa0mxC9LKR7zxVCeAheI4GPThWV99AZhylwA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}