Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b6def3e29195dd767bc7c457b9b3fc713c1aaf721400823925065a971dfbf89' 
  AND token = 'schcDQspd5t1CwtZtucdlqyf0eHEaVehhhn5yHk6ObE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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