Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6608b849603217a411564658ab7893eea140903b8a96ac93d0807a35ee15d137' 
  AND token = 'HRgMM7BWPKN52Zl/tAE5uToaSCKENcr7l0O3V9Txa48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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