Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b72d02ce75ab497fb1b8036da4ab7f4ea2311570eb83deef2936f16283ba31b' 
  AND token = 'js7awAlMjnTZJzq/aakUfiyIOftTfHD1kvY+4dAT9Xc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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