Fastest way to search common elements between 2 list of dictionaries in Python

I have 2 lists of dictionaries.

list1 = [{'user_id':23, 'user_name':'John', 'age':30},
         {'user_id':24, 'user_name':'Shaun', 'age':31},
         {'user_id':25, 'user_name':'Johny', 'age':32}]

list2 =[{'user_id':23},
        {'user_id':25}]

Now I want the output

list3 = [{'user_id':23, 'user_name':'John', 'age':30},
         {'user_id':25, 'user_name':'Johny','age':32}]

I want the most efficient way because my list1 might contain millions of rows.