Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1595bdce8b1a4d6d479b662649a5e6783cd86b313cd8aa372a333a4a376da75f' 
  AND token = '3bdn8IuWhCrGIzmL9+cL8VkEHSfqGZPBn0tsuBGnAVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}