Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4dc997de39be3f7eeb1ba981c365c07bb68d391018581506bc52953060731aa6' 
  AND token = 'eWLBzHxvmdRCunfc56bJ1rR7XyTw2d2nxgi2KgREyPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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