Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d12804329a8490e711ad28f4fe65e6425ed0dfc586cd437c5ae7a78603b5aef' 
  AND token = 'xt8N2KFXOiK1v/cJdX/9mBgI/VZ4cSSML3sYrIbK5ns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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