Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73df726c3b255a3502ce83f3d370f1da1a950465048d9cdc73fd5c7ced712806' 
  AND token = 'doOMT04dGHt5/zaElj5YHjqQsuGfgbyl36oeSWJDBS8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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