Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '21652c6922c826907f8ab227ae0c0b42e196685e950a7a02d90890fd0bad60c4' 
  AND token = 'XOFsrf1OjfjDl7L4J0V9VZ4TWSKxHYZpabJLQ/NLoRM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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