Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38b7922b29fd723e0ad32d3167c1902d7872bf236570b4e0250698831cbd1862' 
  AND token = 'QBHH5XTPfg0IgwLuQs/dsywLDS5OdGGHfe5QSblHvcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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