$ aws dynamodb query

$ aws --region us-east-1 --profile readonly dynamodb query --table-name query_test --no-scan-index-forward --return-consumed-capacity TOTAL --max-items 1 --key-condition-expression "username = :v1" --expression-attribute-values '{ ":v1":{"S":"bob"} }'
{
    "Count": 14, 
    "Items": [
        {
            "username": {
                "S": "bob"
            }, 
            "epochtime": {
                "N": "14"
            }
        }
    ], 
    "NextToken": "xxxxxxxxxxx", 
    "ScannedCount": 14, 
    "ConsumedCapacity": {
        "CapacityUnits": 0.5, 
        "TableName": "query_test"
    }
}