Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85d56b01344616a7f3e8139f075ddec9bf0e6e9b161813b95630b914dcff63a8' 
  AND token = '2zXOlxtMgN4eG/IU6ll/IRiGKNuwlg1JiO1mS3ncPgs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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