Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '586ff399ac59062ffd5a13e7052d8334e6807eb3c3bfcc95961a5650e1e06b56' 
  AND token = 'uWIynUC3ct89yz7ZU9GxvIxgU2bYpxAFYSOTiuOxnaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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