Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eac304c4d01783c39df507a9261a7cb0a0f9bf3b6edb9d5a17531aa086fd23eb' 
  AND token = 'GrnGt9bTef6CIHzwWkQdJzab6ExtJBEx4e66XIjqEXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

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