Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '666f6bb29921d2e40ce75eb30f416f2b2adb35c39a5e6262a84a1c697becf6f0' 
  AND token = 'IFxGwoagArt2SNFYRnmKGh08QtiEzkZo4l17CKoKgKE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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