Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '169a3201047e73d1ec50637a467c1a8b6208db4b42a2cab48a4bdcc74d338e4a' 
  AND token = '05DqReGWqHw7Xxc6+7/ycAUjZZAEuyTUTIBbD2SSYeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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