Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69824f3178b52856720be456bc7d5b7e8ff21888c37c2fbc5c481ca72b18a221' 
  AND token = 'wRH4CAA/QMgYxzzWRhtKVwOQKQ6e8j3YeOYPObm6I5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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