Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '216e5362fdc0ff324466b44b7cc1f7772fbee292a78e4997fadc31878224fa88' 
  AND token = '1X2+K6fkWLWb8HLaBI9kvA/ZSY7y0U1slkJZL0z7L/Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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