SELECT 
  COUNT(mask_id) 
FROM 
  cscart_rf_phonemask_masks 
WHERE 
  status = 'A' 
  AND company_id IN (0, 1)

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_rf_phonemask_masks",
      "access_type": "ALL",
      "rows": 2,
      "filtered": 100,
      "attached_condition": "cscart_rf_phonemask_masks.`status` = 'A' and cscart_rf_phonemask_masks.company_id in (0,1)"
    }
  }
}