Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a185232e196ffc63f3494478b3e9708b0c8405979bfa766b77b3e448dd66c76' 
  AND token = '1F6Cs9W050ZSN1zXWA3XyHk86rKSZiN8zcNcC0J1Z7E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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