Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ead8ae0adaddb80396cff39d77a21e3db7551a97ce25b535c20a8ebe1c2bae1' 
  AND token = 'wfCtTyKOtoKii6W6AWF9t/w7kjHIZpJECVwfrL8KtbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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