Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e989fecd598e157b4b05af1b03e7d2fb81bab1e848b13bfbbfe2e9b117c9265' 
  AND token = 'egDxJiwus2zg4FM8fim/5b2km1bgUFsvbkF2DHKTecM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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