GolangでPreSignedUrlを発行するコードを書いたので残しておきます。

package main

import (
	"context"
	"fmt"
	"time"
    "os"


	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/aws/credentials"
	"github.com/aws/aws-sdk-go/aws/session"
	"github.com/aws/aws-sdk-go/service/s3"
)

	// S3の接続情報
	accessKey := os.Getenv("AWS_ACCSESS_KEY")
	secretKey := os.Getenv("AWS_SECRET_KEY")
	region := aws.String(os.Getenv("CUEE_DB_REGION"))

	creds := credentials.NewStaticCredentials(accsessKey, secretKey, "")
	session := session.Must(session.NewSession(&aws.Config{
		Credentials: creds,
		Region:      region,
	}))
	svc := s3.New(session)
	c, _ := svc.PutObjectRequest(&s3.PutObjectInput{
		Bucket: aws.String("バケット名"),
		Key:    aws.String("/diectory/filename"),
	})

	url, err := c.Presign(15 * time.Minute)
	if err != nil {
		fmt.Println("error presigning request", err)
		return nil, err
	}

	fmt.Println(url)
}

ここで有効期限を設定できます

url, err := c.Presign(15 * time.Minute)

公式
https://docs.aws.amazon.com/sdk-for-go/v1/developer-guide/s3-example-presigned-urls.html

Bodyにファイルを含め、発行されたURLにアクセスすればアップロードできます