Untitled

<div id="fixed-item">
	<div class="wrapper">
		<a class="button" href="#" target="blank">Jakiś tam link</a>
	</div>
</div>
<style>
#fixed-item {
	position: fixed;
	right: 0;
	top: 0;
	bottom: 0;
}
#fixed-item a {
	background: #000;
	color: #fff;
	padding: 20px;
}
#fixed-item .wrapper {
	display: flex;
	align-items: center;
	height: 100%;
}
@media all and (max-width: 992px) {
	display:none;
}
</style>