UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'nLO+RgPSjzpTqoYL+11nvZu1H3ScB6W7vBMNV8hUn8Y=' 
WHERE 
  key_id = '50d6f0caa80286b0c3ae38b069577ab9ab59bca6780ea41724b69acfb8548da2' 
  AND (
    token = 'nLO+RgPSjzpTqoYL+11nvZu1H3ScB6W7vBMNV8hUn8Y=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )

Query time 0.00046