Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef6960fbde4022c4d6be4a9540fe8d32de878609b8e8b2e38e03908ff7089fcb' 
  AND token = 'dZN7bt/yFAjOT1qfevRckGQEj/6BoIZ+Cep6vOQTdGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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