Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70e33186669b42016096099265b86b4630f5d60affb4d412f9ef4d53611281c6' 
  AND token = '9mJRTIR1vKxaqIcbp8pUFO/sYWJL2TWXueJEiCnL/ik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

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