Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '854354b226168b6b4a34b75a3f79689acb9995ef32519bd611c997a4c0660927' 
  AND token = 'nj65TMRE7P+4+lI1+XfLAyWk1LmlE0vQxfldB3FD5lY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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