Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42452ea2cb43915cc02e100db9a9c9160de2e9dfda314b78c849850a12ec0227' 
  AND token = 'J4+5lvapvRYLzAUeClMN+Il6DwNIv87ohVomAjurWIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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