SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80db2a9cf3d192233850a94b4c931dac78b59a1f73117b13ed2f8d058b1d2398' 
  AND token = 'y25ODqiF9YVEuz/6I6sf3dgxZaF2jW33hxX1a9nQiqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

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