Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c8433f6a9e30ac080c700a96954393ed7ad80bfe8a211492e071d55e1dd7fd0' 
  AND token = 'zTJcJ1/ndILBc2HSnB92rpI81dscl9cGZpftIIbPFS0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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