Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ce869c8f434736810278dbaffcb2798bad1ec743a322d023c743513d866e065' 
  AND token = 'lbJbaeyKwP4FWjh/x5ywczzR7DRi5vp6tubzrats0nM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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