inventory file:

[usr@host automation]# cat inventory
[nsm-064-1]
10.1.242.11 ansible_user=nsm csa_id=22222 ansible_ssh_pass=12345

------------
Playbook

[user@hostautomation]# cat playbooks/t.yml
---
  - hosts: all
    gather_facts: True
    become: True
    debugger: always
    vars:

    tasks:

      - debug:
          msg: "csa_id: {{csa_id}}"

------------
Run Output

[user@hostautomation]# ansible-playbook -i inventory --key-file /root/.ssh/id_rsa --limit nsm-064-1 playbooks/t.yml

PLAY [all] **********************************************************************************************************************************************************************************************************************************

TASK [Gathering Facts] **********************************************************************************************************************************************************************************************************************
ok: [10.1.242.11]
[10.1.242.11] TASK: Gathering Facts (debug)> c

TASK [debug] ********************************************************************************************************************************************************************************************************************************
ok: [10.1.242.11] => {
    "msg": "csa_id: 52"
}
[10.1.242.11] TASK: debug (debug)> c

PLAY RECAP **********************************************************************************************************************************************************************************************************************************
10.1.242.11                : ok=2    changed=0    unreachable=0    failed=0