Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98afefdc7ae49695e0b671eaeda19c902006637b936cb67ded536dbc8b9b0e96' 
  AND token = '39Wz5Sfpfo04IqzHAeNoSifXcN4liFkIzVSnN0YwaVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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