Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '38f110870b94e0fa5166bb7e89da61cc2bf2d1c11c90a95fe5b729788cd1c11f' 
  AND token = '9IqQU0129sg8l0zZvLqF/DBIZXq1NWFTCGBOvcM+8cU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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