Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a1d907ab771aa455635939d9db15ee6e30bd0fe24a9edb4d23d7db6af3260ed' 
  AND token = 'uu7+jO3XGJeBz2tCoul4JAM6r9o4UQTmsmVoj9hbiEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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