Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddeb996071f614adb680e948aab3944860b21bd32cf1cc7c353e3e209dcf1d58' 
  AND token = '9wOCP4xCB9cntcILp8BYxRckbTNynSmrGJsdd4I9wpI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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