Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf2f76240543beb8beca50d65bc7abf1233826cf413b49a8f5333c6c61bed769' 
  AND token = 'xdydRcOnSR7JoArS/5svTKb3l9akErDwsj+Jdv0aJBU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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