$subset = $db->col->find(
            array(
                'timestamps'=> array(
                    '$elemMatch'=> array(
                        '$gte'=> new MongoDate(strtotime('2016-05-25 13:00:00')),
                        '$lte'=> new MongoDate(strtotime('2016-05-25 14:00:00'))
                    )
                )
            )
    );

{
    "month": {
        "$date": 1464134400000
    },
    "timestamps": [
        {
            "$date": 1464181803000
        },
        {
            "$date": 1464182103000
        },
        {
            "$date": 1464182403000
        },
        {
            "$date": 1464183003000
        },
        {
            "$date": 1464183603000
        },
        {
            "$date": 1464184203000
        },
        {
            "$date": 1464184803000
        },
        {
            "$date": 1464185403000
        },
        {
            "$date": 1464186003000
        }
    ],
    "status_history": [
        1,
        1,
        1,
        0,
        1,
        1,
        1,
        0,
        1
    ],
    "_id": 12345
}

db.Collection.find({
    created_at : {
        '$gte': new Timestamp(new Date(2012, 0, 21), 0),
        '$lte': new Timestamp(new Date(2012, 0, 22), 0)
    }
})