Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8993ff6861ab14d77e894c741d4e608d4a2ab4808fcbbbcb3dd7e5a7be9ebd9' 
  AND token = 'hWo44Wpk73Dv+hpbRcn4C+1b4jPAPIF9dBJYrjSimYI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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