Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ccbf27ced8e8c37b2d55b09388380c813624100b7c9cd6096f7cba19c24b42d' 
  AND token = 'ZeVrJxex7PqR2Ow0ztuVSlk2VuuKJlxWVGYqsZL1tdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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