Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce0fbf894de0bbdecf8af5ab0fd4754dcb4be79fa52600f5219c8f2e8b9e3d4a' 
  AND token = '+WumTtEW1+hdACjIWc774D1o5JvetPMUseu5+pU5ifY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

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