SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c2255d41c516d510a13404e7ef3fed9f4478bc9c2bbd929da56bfe757b3b960' 
  AND token = 'O/wjStJ88Z7JXMHYWNFDl/vPttFxc2K3Rsbn80kqCZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}