オブジェクト配列の中の要素の索引(findIndex)を検索します.

let objectArr = [{
    name:'fur',
    age:18,
    time:1522801451
},{
    name:'furs',
    age:18,
    time:1222222
},{
    name:'furfur-jiang',
    age:18,
    time:333333
}]

let index = objectArr.findIndex(v=>v.name==='fur')
console.log(index) //0