SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '014ddc19d96ade0d581a85342457dee8fb4a6ca47bf276adcb9efc76c181683d' 
  AND token = 'oBsvWjS6UOj7V9qQprLZdgEkOv1ilFQoSXwNbCS+61w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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