title: best way to return all keys more than X es6
body: <p>I have an objects with keys sorted asc.</p>
  
  <pre><code>{
  0: {},
  4: {},
  85: {},
  266: {},
  }
  </code></pre>
  
  <p>i want to get all the keys where keys > X(=50).</p>
  
  <p>in this case it will return</p>
  
  <pre><code>{
  
      85: {},
      266: {},
  }
  </code></pre>
  
  <p>I want it to be performant because im doing this every 500ms with more than 100+ keys  </p>