You can pass the token in the header:
<script src="{{ asset('themes/js/dropzone.js') }}"></script>
<script>
Dropzone.autoDiscover = false;
$(document).ready(function(){
$('#drop').dropzone({
url: '{{ route('dropzone') }}',
method: 'post',
headers: {
'X-CSRF-TOKEN': $('meta[name="token"]').attr('content')
}
});
});
</script>