Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2400d81ea3b630e0f2abeca1c2efb36d44f5552e40490f943185116a702b0523' 
  AND token = 'VBEpGDEYjN2ccFxYoXp55NI7t7nNJzzbHZYh1aJ7w8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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