SELECT 
  hv.hsycval_status 
FROM 
  cscart_hubspot_obj_syncing_settings AS hs 
  LEFT JOIN cscart_hubspot_obj_syn_settings_value AS hv ON hv.hsycval_hsyncid = hs.hsync_id 
WHERE 
  hs.hsync_name = 'Order' 
  AND hv.hsycval_companyid = 1

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "hs",
      "access_type": "ALL",
      "possible_keys": ["PRIMARY"],
      "rows": 4,
      "filtered": 100,
      "attached_condition": "hs.hsync_name = 'Order'"
    },
    "block-nl-join": {
      "table": {
        "table_name": "hv",
        "access_type": "ALL",
        "rows": 4,
        "filtered": 100,
        "attached_condition": "hv.hsycval_companyid = 1"
      },
      "buffer_type": "flat",
      "buffer_size": "2Kb",
      "join_type": "BNL",
      "attached_condition": "hv.hsycval_hsyncid = hs.hsync_id"
    }
  }
}