Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '915db9cbb43f4a6b9c366f0a2d2baab4d599ed1a26b4462eca664fcc04ea63e9' 
  AND token = 'gbIxt3cmjGqs5LgpwXyC9/JcD+v59gb7LJfbezKDM80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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