SELECT 
  data 
FROM 
  cscart_user_data 
WHERE 
  user_id = 1 
  AND type = 'W'

Query time 0.00023

JSON explain

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