ISODate Query on MongoDB using casbah in Scala

Question

I am using Casbah for Scala to insert/update MongoDB documents. One of the challenges I am facing is querying MongoDB document by date or ObjectId. My MongoDB document looks like

{ "_id" : ObjectId("58d2cfe5fbb1bb15209d3b02"), "name" : "Joe", "db_date" : ISODate("2017-01-26T07:00:00.000Z") }

My query to search MongoDB collection by objectId looks like below

for (x <- collection.findOne(MongoDBObject("_id"-> new ObjectId("58d2cfe5fbb1bb15209d3b02")))) println(x)

My query to search MongoDB collection by date looks like below

val q_date = "ISODATE(" + "2017-01-26T07:00:00.000Z" + ")"
for (x <- collection.findOne(MongoDBObject("db_date"-> q_date))) println(x)

Both above queries do not give me results. I looked up online for example queries but could not find a good example that helps. Your response is much appreciated.

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Update

I am able to search by date using the below query

val q_date = new DateTime(JodaTime)
for (x <- collection.findOne(MongoDBObject("db_date"-> q_date))) println(x)

I had to include the nscala-time dependency and also add RegisterJodaTimeConversionHelpers() inside my definition object