TypeScript: Find Key / Value in Object (list comprehension?)

Question

How to do find index==2 in TypeScript?

myObj = {
  policy : {
            index: 1,
            page : "/summer"
         },
  purchase : {
            index: 2,
            page : "/sun"
         }
}

E.g.

for (var key in myObj) {
  if (myObj.hasOwnProperty(key)) {
    if (myObj[key].index === 2)
       console.log("Found.");
  }
}

How to do this in JS or TS more efficiently?