Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '68f1be7392fc6ffb6d9fbfacbc6c371d0968c2a201d9a2d118c6db7d45b52a90' 
  AND token = 'intJTtbFl9/kBediVEu6rVx3N418mfLy6GJhNbzSrBY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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