Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ea4e7340b44c1dcb3242b46cdc539a3a6faa85e8f43422a5fa5f9fe4545801b' 
  AND token = 'bzzWvP939j3ONUq4/rboe7Mj7CUWpvxDCZrJcAC+egs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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