Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1246af44fbf68cd88b44c50ce13e67057b9a12ba4575e435791f88083fa57fbf' 
  AND token = 'fiZV1pw+AocUJ1mLTgusAw/EEmDw/Nze9dIKTbirc1k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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