Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8a4da7c631095d09d23cb1a0cb86cfa6a321ced68781e50c75092ef3a15c467' 
  AND token = 'n3XHslrXc+PVdz1ae55GeTYwjIXV29oDtzXdI6wnV2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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