SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '244589a3d05b5563a5525cc771bf72bfbe39e21ba733fa96dd32fa6aecaa5f8f' 
  AND token = 'HYovYDVY/S6BW+Hb/1nQUGOzkjY0NCCJlkadUnX4Jz8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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