Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c79bea7ebe102f5d36e513db2419a5631e9c267343bbb35fa8d58de9a000103' 
  AND token = 'FjlaGyvqnh60ElUejOGwxFqEDNTJcMzwqydHQ2LlXyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

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