UPDATE 
  cscart_aprillock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'KYg/Djjhu/cWHFgn8HjrluucLDrEu6Ggx9Q5B88y9NI=' 
WHERE 
  key_id = 'e55a7e6edfa9e99c5e978cad0f7491a81c5455def0da96e06ccba43023c9612e' 
  AND (
    token = 'KYg/Djjhu/cWHFgn8HjrluucLDrEu6Ggx9Q5B88y9NI=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )

Query time 0.00040