Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8678cab18be5d6219e04efd5d2f1de41bff759de3eb3f9137b49bb8bb6016839' 
  AND token = '1Y2IVOU2DKQ98mOgFUMsPTlfIRmW1/IxS1nkmqnzUWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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