Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f025a28a4c3e557a2530055fd4776a3479bbd8ce0d4400e9b733607bc79c8c0' 
  AND token = 'UDM61eVDf3LZABr+V1BI3oC90nkoNgsNStcXDMjWIrQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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