Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22956b5d522ac1634ed36a348f4a36579e1752e20ccb46dd275bb291e9c7dd0c' 
  AND token = 'gam0JQwzTzvOKMFk0fDjskug090INQ+putw7BolWOzk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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