Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a0e9112e551376fb7acf91ff699e2f31a02d07e394b117aa121c7fe742a74ea' 
  AND token = '/z/bAaYrojoiLTt0jmFHck134fMj283lC0wHqGczHwo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}