Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77c6d9cf72db270932d6ec56ccddbff74db74159849351c676dda43f1f7a30ea' 
  AND token = '6i5o58FKcVOsqsjV80Q8NBKWm9x30WtOQVVQQ8eTUb0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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