SELECT 
  * 
FROM 
  cscart_vd_vendor_optional_questions 
WHERE 
  brand_id = 260

Query time 0.00125

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_vd_vendor_optional_questions",
          "access_type": "ref",
          "possible_keys": ["brand_id"],
          "key": "brand_id",
          "key_length": "4",
          "used_key_parts": ["brand_id"],
          "ref": ["const"],
          "rows": 1,
          "filtered": 100
        }
      }
    ]
  }
}

Result

id brand_id optional_data
260 260 {"vintage_start_year":"2024","use_images_social":"","optional_name":"","newsletter_interest":"Sí","newsletter_email":"masbarretos@gmail.com","council_participation":"Sí","marketplace_interest":"Sí","anything_else_txt":"Olvidé escribir mi nombre, Eilyn Martínez. Y Gracias .","fashion_revolution_knowledge":"","fashion_revolution_events":"","fashion_revolution_importance":"","fashion_revolution_interview":""}