[nerv_]

<script src="http://sugarjs.com/release/current/sugar-full.min.js"></script>
<script>
var arr = [
  {key: 3, label: '333333333'},
  {key: 137, label: '555'},
  {key: 2, label: '222222'}
];

alert(JSON.stringify(arr.find({key: 137})));
</script>