Switch

<FormField id="unlock">
  <Switch 
    checked={this.state.checked}
    onChange={({target: {checked}})=>{
      this.setState({checked})
    }}
  />
  <label>Lock/Unlock</label>
</FormField>

Disabled

Use disabled property to disable component

<FormField id="lock">
  <Switch 
    checked={this.state.checked}
    disabled
    onChange={({target: {checked}})=>{
      this.setState({checked})
    }}
  />
  <label>Lock/Unlock</label>
</FormField>