Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2b7fa36f7f6cc8f41c055f3224a8c21792b35795a00123bfd971b83d7726b7c' 
  AND token = 'N8BSColph2s8GrsD7AQIpgYOSr30CcQfV4Jhl63zbc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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