Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb181b6eef6774d70b4571ad708375934b5f1f2593790306616599a630ef3bf4' 
  AND token = 'U3Y9+lTNZz+7p7r5znF/qWCmckh1yDTqzIWgTiGMgbU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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