Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8f721aa96691e6b0f4d989440c11096f829253c693f22d06920858f8adf0a1e' 
  AND token = 'GOGex8faMrvwYwZoPonQN7cjxyFsWYzXKr20eIIG8JA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

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