Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e713bc7e674cc8902479c8c5c3ec042d40180336bff22a6f1f25fd35ae113a44' 
  AND token = 'aLf6/P3o1fTcZ+lI0LoH1px6GHLYLqzUzcg/9k79iNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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