Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80cd88f07187cba318e99c1998b44b8358a7bdf1d88fa043f3e9f685fde4511d' 
  AND token = 'YRPLl2TFh+w6PcFOQSRI9aFtan9lYpO9JnPBcC5YCeQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}