Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c2f10bc2707f5d4eec84b9d8de26a84268747e48f7197d1d5e83d3c174c6650' 
  AND token = 'IWN/XpPlU63ss//JAnXQxiSPf89RxmBg23IEngobLEc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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