Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0210299208fc0634dc3bb53585031b23bae7d3aa5cf0ed3b802d66e23424576' 
  AND token = 'ixps/h5dMdbYN15uks3H+zZPqmhpKmh94WcUBh/z4/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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