Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3bb82354e07335c9d0203b4c86c6199ddf79906847513c87c242c08a4f221a46' 
  AND token = 'Cl9dlbUFzrHkdvsUA0TwRlOjFU4Q7nye8PdxG6Shuo8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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