Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdbfbff70164a15755eddf1da18cf777e6bd2a441f89bea7e1fabb769766a294' 
  AND token = 'n7lnVAbWq+wxT3eCt1okImvsjIjtgj+WkNvcI4ARScY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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