SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '2d31ec464eec0be11f27e4f5f7f8b75c780bdae517b288ba15ccc7fdcc26d758' 
  AND token = 'K/+H/WtCKppqYM4qrvYV8JgENzCunmPK08aPTQzxy2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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