Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49bf3ceb9e71afd48984d4d8cd2f2b23e1192c74f3d8ae503eb4cd01b3b546d3' 
  AND token = '14KAC3d6mpj1CDSX2iq2YgjOCVlOWmheoSXh9Mbi9+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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