UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 300, 
  token = 'x81u5T2eojOZvqKGw3VIMWgSjs5oILB4xeZHDn3p1tk=' 
WHERE 
  key_id = 'e766b951e4ec3d3bdaa645014946d9de7dc3a67c95286f1870766913e1d1f650' 
  AND (
    token = 'x81u5T2eojOZvqKGw3VIMWgSjs5oILB4xeZHDn3p1tk=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )