Django: Facebookで発行したアクセストークンをPostmanでテストしたら「AccessToken matching query does not exist」と返ってきてしまう

###前提・実現したいこと
Python(Django)でUBER EATs風のアプリを作っています。

注文を追加するAPIをPostmanでテストした際に「AccessToken matching query does not exist.」というエラーが発生してしまっています。

アクセストークンはFacebookで発行したものです。
https://developers.facebook.com/tools/accesstoken

###発生している問題・エラーメッセージ

DoesNotExist at /api/customer/order/add/
AccessToken matching query does not exist.
Request Method:	POST
Request URL:	http://localhost:8000/api/customer/order/add/?access_token=kNhEuvGmjPbXw1jaN3GIwWKrLyRuTv&restaurant_id=1&address=17%20BKK1&order_details=[%7B%22meal_id%22:%201,%20%22quantity%22:%202%7D]
Django Version:	1.11.4
Exception Type:	DoesNotExist
Exception Value:	
AccessToken matching query does not exist.
Exception Location:	/Users/admin/Desktop/myvirtualenv/foodtasker/lib/python3.6/site-packages/django/db/models/query.py in get, line 380
Python Executable:	/Users/admin/Desktop/myvirtualenv/foodtasker/bin/python
Python Version:	3.6.0
Python Path:	
['/Users/admin/Desktop/foodtasker',
 '/Users/admin/.pyenv/versions/3.6.0/lib/python36.zip',
 '/Users/admin/.pyenv/versions/3.6.0/lib/python3.6',
 '/Users/admin/.pyenv/versions/3.6.0/lib/python3.6/lib-dynload',
 '/Users/admin/Desktop/myvirtualenv/foodtasker/lib/python3.6/site-packages']
Server time:	Wed, 16 Aug 2017 12:53:34 +0000

###該当のソースコード

Python
1@csrf_exempt
2def customer_add_order(request):
3    """
4        params:
5            access_token
6            restaurant_id
7            address
8            order_details (json format), example:
9                [{"meal_id": 1, "quantity": 2},{"meal_id": 2, "quantity": 3}]
10            stripe_token
11
12        return:
13            {"status": "success"}
14    """
15
16    if request.method == "POST":
17        # Get token
18        access_token = AccessToken.objects.get(token = request.POST.get("access_token"),
19            expires__gt = timezone.now())
20
21        # Get profile
22        customer = access_token.user.customer
23
24        # Check whether customer has any order that is not delivered
25        if Order.objects.filter(customer = customer).exclude(status = Order.DELIVERED):
26            return JsonResponse({"status": "failed", "error": "Your last order must be completed."})
27
28        # Check Address
29        if not request.POST["address"]:
30            return JsonResponse({"status": "failed", "error": "Address is required."})
31
32        # Get Order Details
33        order_details = json.loads(request.POST["order_details"])
34
35        order_total = 0
36        for meal in order_details:
37            order_total += Meal.objects.get(id = meal["meal_id"]).price * meal["quantity"]
38
39        if len(order_details) > 0:
40            # Step 1 - Create an Order
41            order = Order.objects.create(
42                customer = customer,
43                restaurant_id = request.POST["restaurant_id"],
44                total = order_total,
45                status = Order.COOKING,
46                address = request.POST["address"]
47            )
48
49            # Step 2 - Create Order details
50            for meal in order_details:
51                OrderDetails.objects.create(
52                    order = order,
53                    meal_id = meal["meal_id"],
54                    quantity = meal["quantity"],
55                    sub_total = Meal.objects.get(id = meal["meal_id"]).price * meal["quantity"]
56                )
57
58            return JsonResponse({"status": "success"})

###補足情報
python-3.6.0

dj-database-url==0.4.2
Django==1.11.4
gunicorn==19.7.1
olefile==0.44
Pillow==4.2.1
pytz==2017.2
whitenoise==3.3.0
psycopg2==2.6.2
django-rest-framework-social-oauth2==1.0.8
django-bootstrap3==9.0.0
djangorestframework==3.4.3