SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cb874209295bb4312cb98100d641ae58c3388df7999cc17c5a2b1b76d969592' 
  AND token = 'TtyvJ5ZkQfPA0QGJzrtbN+9Ymchgs6YVGHefvO7wOXQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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