Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '664e02903410ae96b1d9431f4428a6285aeb64b6976599c196f8c4287d15da02' 
  AND token = 'TywOwct6oD9HgB0a8o8zY8nGqRU1px7GowXFvAzSvrA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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