Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b367a457866679e4dcc7d1434e81eadcc9fa025a6159ae760f53177b77d84683' 
  AND token = 'u1MMKFkNb4FF596Kifgl4PGa0ttY3hKrRUWVcl3Oxyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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