Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '44d7656b7005add12a2223aa342cd15402029587eeba82dfb3fe82b9a82e55ff' 
  AND token = 'kq0oifpyPXcwKCWBnNo2f4x/0YA8FLXcyBWdQV3J0Zs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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