SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '7e1dbe40fb44c757492923d6475883eb5c8897611e233bdce3b34023d822d1ee' 
  AND token = 'fVLDSoAzFrbCxJGr4xHpwBjfh9vCyfLlVY/TqVvr++4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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