Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12da5a64e2db546ef0258d6c86728c2b6b3b298e67c56ed26a09b343db3ff445' 
  AND token = 'ZHz+MSRisFG4ciSGOLxs5nRJ6NpDUsJ1K0LuLAAfir8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}