Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41e97536cbdabf3bf7f955a1dc75d24608b1d3ec39743ec9435988eabe1ea372' 
  AND token = 'EZxXf/Jc77SDIanV2FSYOALvL89JE4zQmnIEw5GY1WU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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