SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dca70cbd4633a6e096871e538385d03e577b8318e3624624a0ba20de8b4cb215' 
  AND token = 'eKxoQgJ32LwtWVKRiFqZ+RGFIv+x2wm/l9BQ7tEm5uU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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