Website parsing in python. How to specify POST request parameters?

Question

Python

There is a website with a search form https://www.sf-filter.com/en/vergleichsliste/?sf-c... => see picture.
I enter a keyword into the form and try to parse the returned query results.
There are a couple of thousand keywords, so you need to do it programmatically.
After pressing the "Submit / Search / Enter" button, the browser shows that there were two POST requests.
The first POST request is like this
https://www.sf-filter.com/WebPortal/async.aspx
with parameters

txt_ArtSearch=0110d0
crypt=024YX9/HsQgaKQQ55DhXTgEqA==WbpRaFfFOkPuQGn0B1jd6g8P0zQUbI06LhmJMoT3xUAHeqUwhFBvqIwAnmxp4lPC
originalUrl=https://www.sf-filter.com/en/vergleichsliste/?sf-client=20

and the second POST request is

https://www.sf-filter.com/id/5F59032AF1A249C9AEA21A4DCED078CF8E2611E9708A4486AE51411487E24F64.htm

with parameters

txt_ArtSearch=0110d0
originalUrl=https://www.sf-filter.com/en/vergleichsliste/?sf-client=20

search form code below

<form action="javascript:void(0)" id="SPCompareList" method="post" name="SPCompareList" novalidate="novalidate">
      <div class="section-inner text-center">
       <h2>
        Cross reference list
       </h2>
       <p class="section-intro">
        Please enter any filter number and we show you the best suitable SF quality filter for your needs.
       </p>
       <div class="form-group" id="searchBtn">
        <input autofocus="" class="flat" id="txt_ArtSearch" name="txt_ArtSearch" placeholder="Enter item number" type="text" value="0110d0"/>
        <span class="form-icon" onclick="$('#SPCompareList').submit()">
         <i class="fa fa-search">
         </i>
        </span>
       </div>
      </div>
     </form>

with further manual input of keywords and clicking on the search button, only one post request is added, similar to the first one, but the parameter

crypt=024YX9/HsQgaKQQ55DhXTgEqA==WbpRaFfFOkPuQGn0B1jd6g8P0zQUbI06LhmJMoT3xUAHeqUwhFBvqIwAnmxp4lPC

changes every time
Which direction to look for ?
What is the name of this defense?
Is it possible to somehow bypass it and automate the process without SELENIUM?