Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '469086cef4106e9e135e333bf0c495e25cdcf5925e33c67052a0d51cc92e8168' 
  AND token = 'LFm+mLCn0UtFo0mZ70v7tyhOry8Bj84/QQzaLajCFUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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