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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '0fc000f00cd215f1f05ccf4e84ab945bf70d6bd2bd0bb7cd720a907621a4dff9' 
  AND token = 'LA0qIflsYtsgjtkJrfwR1srg+TjEsAQuVdnVTNPQHVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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