Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ea2772d8e6c90825f28f287bcd8b3bb67237873bb4198a0c0ad0ecebb9332ce' 
  AND token = 'es3HOkEftK4OIkTJJKzSDbiASoFoPxxHlDnWZEPlSQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

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