Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a4655c12b9338044f8abc735aa2fd6f3e6a74f3d04988cc9cb3031e80f03222' 
  AND token = 'PdFGp/3S9hnt3CkkmlkUa+8z+ZXZ+gVIkF4eHv7PNew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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