Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8776428e19dcf17c72b939f8d297a4a501028c658c5a4dd917aa00c91950f22' 
  AND token = '0Er12OK0B8ivTZrVkKv8wpFhnueTsp7eVITGola5eS0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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