UPDATE 
  tmall_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'xU6MtknA1+xs4PxQWVACzQq5k+t+v+yryyP4P8IZD8Q=' 
WHERE 
  key_id = '291f95a3ea1887731a39376f21b87939ecfac5f1edd803d1509a2c924a886a1c' 
  AND (
    token = 'xU6MtknA1+xs4PxQWVACzQq5k+t+v+yryyP4P8IZD8Q=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )