Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eefb1c48ad933a44f54ba95e319245ab293ef6bc04baf67ee0e64a9c19912ed8' 
  AND token = 'PRrCODXSD2kcJH3xGa3uKnTh06dholP8YnTsAnYCl4M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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