Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a354750969358dbe7d329a1ad60d883aeac1489c6ab884ab60f2892f04044cab' 
  AND token = 'e2EJ8GiGhmiOaSYQKneEiV4l874FUIRGyQ0y6sKOHPw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}