Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76977904652e1d153b687b8ab5d17f1e2fffbb669729f2b9c20583c2fb139109' 
  AND token = 'RHWBgZax02uNsMhqfR+wOR+/iCcEZP6EEtwkSnAd2yw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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