<div class="pic">
  <div class="button"></div>
</div>

.pic {
  width: 70%;
  height: 50vh;
  background: url("http:unsplash.it/400x300");
  background-size: cover;
  background-repeat: no-repeat;
}

.button {
  position: absolute;
  top: 30%;
  left: 60%;
  height: 60px;
  width: 100px;
  background: aquamarine;
}

.button:before {
  content: "";
  width: 25px;
  height: 2px;
  background: slategray;
  position: absolute;
  top: 50%;
  margin-top: -1px;
  right: 24px;
  transition: all 0.3s ease;
}

.button:hover:before {
  right: 34px;
  width: 35px;
}

.button:after {
  content: "";
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 5px 0 5px 5px;
  border-color: transparent transparent transparent #000000;
  position: absolute;
  top: 50%;
  margin-top: -5px;
  right: 20px;
  transition: all 0.3s ease;
}

.button:hover:after {
  right: 34px;
  right: 30px;
}