How can I simplify this if statement in JavaScript?

```
    if ((sessionStorage.getItem(EXTERNAL_SEARCH) === 'true') && 
       ((storageKey === KEY1) || (storageKey === KEY2))) {
          sessionStorage.setItem(EXTERNAL_SEARCH, 'false');
          return '';
   }

```

Basically what I need is the following:

```
if(condition1 && (condition2 || condition3)){do something}

```

PS. Someone gave me two minus points for my question. I did my research and wrote the best condition I could but knew there is a way to optimize it and that is why I wrote it. If I could have optimized it myself, I wouldn't have posted it.