Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c99b7a78c30700a425f94ffc59c7d8d7ffbdcedb55b1d2c33c97c301f3c61034' 
  AND token = '2VFj4uNsxp02fNav7Jzs92EcdHsPFzC5z293KR7qz4Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

Explain
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE								Impossible WHERE noticed after reading const tables