SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb80469c26739b5ea37523f3b86615886b3e4cccd4485ab214449dd40207c01f' 
  AND token = 'KhyoMuwXdWgiwnmMzLPPvlwGsG7zIZrI7znTaTHgR00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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