MLT query to change score only

Looks like "minimum_should_match" can't be less than 1, but I can add "match_all":

POST locations/_search?size=100
{
  "query": {
    "bool": {
      "should": [
        {
          "match_all": {}
        },
        {
          "term": {
            "country_code": "mg"
          }
        }
      ],
      "minimum_should_match": 1
    }
  }
}