Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '540af8784a393f34c9226f74c64cc1186e511d8229bb2ea1764e659dafe96153' 
  AND token = 'CnJDa8lA5jp21w2GPv2JoovtIauDI4f/5YvNhyBXIro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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