Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a7c12b13ee0705a9136b602c6e6873c1f8884a222db4b95f894584b2e4ea93e' 
  AND token = 'qZFLps2SGsBAB6pE7zQEyuteev77boVSnW8FIlDgFT4=' 
  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