SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '802a2738775f42db4f67cbfb468f1b03c9643d19fa7706e901a4c37aab041d6f' 
  AND token = 'IDIV7w8u4Qs6oXQJsA/P1zNubr1rXLkjpRTOdEolb8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

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