JSFiddle - React, Tailwind, and code Playground
HTML
<div class="form-group">
<label for="select" class="control-label text-uppercase">Высота букета:</label>
<input type="hidden" id="msal_price_original" value="1 040">
<input type="hidden" id="msal_hash" value="d231c6792480e6b57c403c7e94881f94" name="msal_key">
<input type="hidden" id="msal_show_cost" value="" name="msal_show_cost">
<div class="col-md-12">
<label class="col-md-7" for="msal_66">40 см (только по предзаказу) <span id="msal_cost_66">+ 0</span> руб.</label>
<div class="col-md-5">
<input type="checkbox" name="options[msal][66]" class="form-control msal_input" id="msal_66" data-price="0" minlength="0" data-discount=" ">
</div>
</div>
<div class="col-md-12">
<label class="col-md-7" for="msal_67">50 см <span id="msal_cost_67">+ 710</span> руб.</label>
<div class="col-md-5">
<input type="checkbox" name="options[msal][67]" class="form-control msal_input" id="msal_67" data-price="710" minlength="0" data-discount=" ">
</div>
</div>
<div class="col-md-12">
<label class="col-md-7" for="msal_68">60 см <span id="msal_cost_68">+ 960</span> руб.</label>
<div class="col-md-5">
<input type="checkbox" name="options[msal][68]" class="form-control msal_input" id="msal_68" data-price="960" minlength="0" data-discount=" ">
</div>
</div>
<div class="col-md-12">
<label class="col-md-7" for="msal_69">70 см <span id="msal_cost_69">+ 1 2100</span> руб.</label>
<div class="col-md-5">
<input type="checkbox" name="options[msal][69]" class="form-control msal_input" id="msal_69" data-price="1 210" minlength="0" data-discount=" ">
</div>
</div>
<!---->
<!-- -->
</div>
JavaScript
$(".form-control, .msal_input").change(function() {
this.checked ? $("." + this.className).not(this).prop("disabled", true) : $("." + this.className).not(this).prop("disabled", false);
});