SELECT 
  COUNT(*) 
FROM 
  cscart_access_restriction 
WHERE 
  type = 'd' 
  AND status = 'A'

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}