SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89fece868ab922472dd209b34d7f128afe73e3e3cc7bd2e7fcee683313bfabbc' 
  AND token = 'MHIlIuVe/aCtNUcllvVTr6nR+JqP2T5E3UpHAJ9RuP4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

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