Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd9de284d71824aa5b6507c4199d070d10c3622aa56f67e0f90e6251fa18f999' 
  AND token = 'FIk32FT2qNF0La7PXR1tmX8tFTS0daj3EUV64h79z84=' 
  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