Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83964de67833c629efb829d535dcd742c3c86785005b0c2bda7a64dd908df491' 
  AND token = 'aPz660GWYPpjaRs7/RxGKM11sqSdb/b2hBkXITo96eA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}