Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e26a83dba3d98a8099319c9977a2a93b8a9d74e1404fa9f3baad2ae128184c4' 
  AND token = 'wVqcxT6snle41b/LTIMFlRjVlZwSZGy8fAPXsbT/FSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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