res = client.workflows.executions.list(("my_workflow", "1"))

from cognite.client.utils import timestamp_to_ms
res = client.workflows.executions.list(
    created_time_start=timestamp_to_ms("1d-ago"))

{
  "items": [
    {
      "id": "059edaa4-a17a-4102-910e-2c3591500cce",
      "workflowExternalId": "<string>",
      "engineExecutionId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "createdTime": 1730204346000,
      "metadata": {},
      "version": "<string>",
      "startTime": 1730204346000,
      "endTime": 1730204346000,
      "reasonForIncompletion": "<string>"
    }
  ],
  "nextCursor": "4zj0Vy2fo0NtNMb229mI9r1V3YG5NBL752kQz1cKtwo"
}