Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78733e017fb1f9a85490888b337e3a8402f7538f5c5bd4747fd71963a0eb5512' 
  AND token = '81inVOCaa02ByfsOlPz2Ka9Bp7qKSnGVhWRmfGfUNXU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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