Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2398fa578e04c8865271fc5d22804b18884c1943ca72b08c47c5cfb49072360' 
  AND token = 'klWilgGr7CRaLNefMi4b3nkBdVbQa9xN0YkENQIqyNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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