SELECT 
  param, 
  param_3 
FROM 
  cscart_static_data 
WHERE 
  param_5 = '4' 
  AND section = 'A'

Query time 0.00346

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.0144408,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_static_data",
          "access_type": "ALL",
          "possible_keys": ["section"],
          "loops": 1,
          "rows": 22,
          "cost": 0.0144408,
          "filtered": 100,
          "attached_condition": "cscart_static_data.param_5 = '4' and cscart_static_data.section = 'A'"
        }
      }
    ]
  }
}