SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f001355849e973cd6752b6143a231c90432ca372a259b41bdfda8140a6bc05b9' 
  AND token = 'TZoXr/PZCnZJacIKABcuIL9GSVCr1eomhgepzumlhfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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