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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '36d12f34ad410917f5687726c0b75f49385d36bcfc92293b6c298bb97ee7df44' 
  AND token = 'jv6Mwj6JlqcVl6ZIW2vZm6Hv9+K90HbxU497lqD9MAM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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