SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '123b258b3b2d11008a72efed51a3ef2d42e077a147ce05b613817436da0f4894' 
  AND token = 'kIEVk/10Otz9kvMRUVyKOicgG8JaUuYGsfcHk7fLdEY=' 
  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