Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f443356a6363e0df11acf038bba76b664fa65860723b623a4b74ff219d9dc53a' 
  AND token = 'TZtN3CRNskAT5Jt1+MzT7PWRwal2MtYEcXjuUKsFmo0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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