Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3d530c77af9a07cf7990ca9f2ad08cd639c5a2f16c20b1c160ad49f5e3f9ecd' 
  AND token = 'bADTOGL89a7SCh2cnkpDPuUz/9DKIjNgS++OS94CRPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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