Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea924cf2e7de4a1dd8ac5286da1a45e46e2f24371ddc0fe06b26489339f21692' 
  AND token = 'hFKvMX0f2VOAaQ6abCn0UgcjPThVtPaKip9cILldYTM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

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