Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64c6191b6ddef18ce6b0bfd1e208a8c5c4a9464c5289a5f427c0473d50c4261f' 
  AND token = 'KLtvpfGrJsF0UkRdDH1a2TYxHea5mq9FvtFfhYe8TIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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