Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1323dce7f37d62cdad0012e23cbeee5ff440cae20127a4076fd2dad38eeb39f0' 
  AND token = 'J3gIzCxJKbYcO43DywWzkaNReu4nOicmzFkZc3JrVfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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