Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '310e841e4b23bce9f2aa000d90a7a529ed84c2c45f785b04a857c0ece2c2f009' 
  AND token = 'N+HtI6Y+n8uJHmni3KYb066eag4/6wgI9lVM+eHrYAY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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