Python exclude non accessible image with requests

Question

I've written a really simple function with requests, which with a giver URL checks if it gets a response and if this response is an image. It actually works, but is crazy slow at times. I'm too inexperienced to understand why is that. How can I improve it or achieve the same thing in a better and faster way?

def is_image_url(url):

    try:
        response = requests.get(url)
        status = response.status_code
        print(status)
    
        if response.status_code == 200:
            content_type = response.headers.get('content-type')
            print(content_type)
            if content_type.startswith('image'):
                return True
        return False
    
    except Exception as e:
        print(e)
        return False

I'm using that function to exclude images who are not accessible, like images from Instagram, Facebook etc. I thought it could work fine because I actually need to check only 10 images that I get from Google custom search API.

for now I've excluded the function from the application, and tried do a similar thing with checking the image height or width to assure that it existed and was accessible without much success.

loop i use to call the function

for image in img['items']:
                        height = image['image']['height']
                        width = image['image']['width']
                        imgTitle = image['title']
                        imgHtmlTitle = image['htmlTitle']
                        imgContext = image['image']['contextLink']
                        imgLink = image['link']
                        workingImg = is_image_url(imgLink)
                        print(f'alt {height}.... larg {width}')
                        image_info = {'imgTitle' : imgTitle, 'imgHtmlTitle' : imgHtmlTitle, "imgContext" : imgContext, "imgLink" : imgLink}
                        if workingImg:
                           image_results.append(image_info)