How to get result in scout/ElasticSearch with distance filter ?

hello , I work with Scout /Elasticsearch and this script works fine :

    return search_index::search('*')
        ->from(0)
        ->take(50)
        ->get();

now I would like to get results less than 10KM from this point ['lat' => 35.5, 'lon' => -2.6], every indexed document is located with :

...
                    "station_location": {
                        "type": "geo_point"
                    },
...

here my Elastic search index

{
    "stations_search_engine": {
        "mappings": {
            "search_indices": {
                "properties": {
                    "company_id": {
                        "type": "text",
                        "fields": {
                            "raw": {
                                "type": "keyword"
                            }
                        }
                    },
                    "company_label": {
                        "type": "text",
                        "fields": {
                            "raw": {
                                "type": "keyword"
                            }
                        }
                    },
                    "company_name": {
                        "type": "text",
                        "fields": {
                            "raw": {
                                "type": "keyword"
                            }
                        }
                    },
                    "id": {
                        "type": "long"
                    },
                    "line_id": {
                        "type": "text",
                        "fields": {
                            "raw": {
                                "type": "keyword"
                            }
                        }
                    },
                    "line_label": {
                        "type": "text",
                        "fields": {
                            "raw": {
                                "type": "keyword"
                            }
                        }
                    },
                    "line_name": {
                        "type": "text",
                        "fields": {
                            "raw": {
                                "type": "keyword"
                            }
                        }
                    },
                    "line_number": {
                        "type": "text",
                        "fields": {
                            "raw": {
                                "type": "keyword"
                            }
                        }
                    },
                    "line_url": {
                        "type": "text",
                        "fields": {
                            "raw": {
                                "type": "keyword"
                            }
                        }
                    },
                    "station_address": {
                        "type": "text",
                        "fields": {
                            "raw": {
                                "type": "keyword"
                            }
                        }
                    },
                    "station_label": {
                        "type": "text",
                        "fields": {
                            "raw": {
                                "type": "keyword"
                            }
                        }
                    },
                    "station_location": {
                        "type": "geo_point"
                    },
                    "station_name": {
                        "type": "text",
                        "fields": {
                            "raw": {
                                "type": "keyword"
                            }
                        }
                    }
                }
            }
        }
    }
}