diff --git a/airflow-core/src/airflow/api_fastapi/core_api/routes/public/variables.py b/airflow-core/src/airflow/api_fastapi/core_api/routes/public/variables.py
index 705880c4898a6..b481db00ea5e6 100644
--- a/airflow-core/src/airflow/api_fastapi/core_api/routes/public/variables.py
+++ b/airflow-core/src/airflow/api_fastapi/core_api/routes/public/variables.py
@@ -174,14 +174,7 @@ def post_variable(
 
     Variable.set(**post_body.model_dump(), session=session)
 
-    variable = session.scalar(select(Variable).where(Variable.key == post_body.key).limit(1))
-    if variable is None:
-        raise HTTPException(
-            status.HTTP_404_NOT_FOUND,
-            f"Variable with key: `{post_body.key}` was not found",
-        )
-
-    return variable
+    return session.scalars(select(Variable).where(Variable.key == post_body.key)).one()
 
 
 @variables_router.patch(