Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3c013d6c1d9359f8eda50190faf8c9a5f1cb019c35cef0a97ff54bb244fcff1' 
  AND token = 'wYdK8MqPlGxe1Et9ROl1S5s4Ocv8lfGfTRKAkCmDCoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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