Query

{
  "where": "p.productId == 12", 
  "as": "p", 
  "from": "Products", 
  "select": "first(p)"
}

Results

{
  "category": "Dairy Products", 
  "unitsInStock": 86, 
  "productName": "Queso Manchego La Pastora", 
  "unitPrice": 38.0, 
  "productId": 12
}