Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83ef0501188d9f249d8812f9d0551991606837b7bbbc7b83f367c9be8c3cf238' 
  AND token = 'WjK0LdNBHYFqeQVS1ttw08tDWGo4VB3ibXZe9hhiSuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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