Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89f41bffd27a345f5bfc6c17a1438307daa1e2f7805eb1766723c1e40fdf9169' 
  AND token = 'kWEGGqO/xX9AaJI1ssCifiE4gGwbnokyePtBfRwv+3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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